Strange Scrollbars in Firefox

Hi All,

I am having a problem with my Firefox browser scrollbars (please see attached images). The sidebar image is not rendered properly, with strange effects appearing on the top and bottom of the scrollable bar.

Here are my specs:

Firefox 2.0.0.12
Kubuntu 2.6.20-15-generic
KDE 3.5.6

I have tried using the "Install scrollbar fix..." option in the KDE system settings GUI but to no avail